I sharpen a sword and reach the sky, hoping to compete with the heavens in height.

Ye Qingzhou learned the profound meaning of the swift sword from the book Lunyu written by Kongzi, and understood that all swordsmanship in the world is invincible except speed.

At the age of thirty, when the sword speed exceeds Mach 30, other countries will stand up when they see it.

At forty, you are no longer confused: when the sword speed exceeds Mach 40, no country will leave you confused.

At fifty, one knows the destiny: When the sword speed exceeds Mach 50, you will let other countries know who the true destiny is.

Sixty and obedient: When the sword speed exceeds Mach 60, other countries will whisper words of obedience in your ears.

At seventy, I can do whatever I want without breaking the rules: When the sword speed exceeds Mach 70, I can do whatever my heart desires and no one can break my rules.